Данное число - 56.
(56 + 7/8) + (56 + 4/9) + (56 + 3/7) = 515
56 + 7/8 = 56.87556 + 4/9 = 56.444...56 + 3/7 = 56.428...
56.875 + 56.444... + 56.428... = 515
Данное число - 56.
(56 + 7/8) + (56 + 4/9) + (56 + 3/7) = 515
56 + 7/8 = 56.875
56 + 4/9 = 56.444...
56 + 3/7 = 56.428...
56.875 + 56.444... + 56.428... = 515